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ACSM CPT > elbow jts > Flashcards

elbow jts Flashcards

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1
Q

humeroulnar jt is articulation of the

A

distal humerus with the promxial ulna

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2
Q

humeroradial jt is articulation of the

A

proximal radiaus with proximal ulna

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3
Q

3 major ligaments of elbow

A

ulnar (medial) collateral ligament
radial (lateral) collateral ligament
annular ligament

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4
Q

ulnar (medial) collateral ligament connects

A

humerus w/ ulna

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5
Q

radial (lateral) collateral ligament connects

A

humerus w/ radius

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6
Q

annular ligament connects

A

radius w/ ulna

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7
Q

collateral ligaments provide what?

A

support for stresses in frontal plane

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8
Q

ulnar (medial) collateral ligament provides support for stress that are what kind of forces?

A

valgus forces

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9
Q

radial (lateral) collateral ligament provides support for stress that are what kind of forces?

A

varus forces

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10
Q

lateral =

A

varus

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11
Q

medial =

A

valgus

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12
Q

The annular ligament provides

A

stability for the radius, securing it to ulna

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13
Q

The elbow jt complete is a compound what joint that consists of what 2 articulations?

A

synovial jt w/ 2 articulations: humeroulnar and humeroradial

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14
Q

The elbow joint is what w/ proximal RU jt?

A

continuous

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15
Q

The proximal RU jt being continuous w. elbow jt allows

A

radial head to rotate during pronation and supination of forearm

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16
Q

What does distal humerus articulate w/ ? What are they enclosed by?

A

distal humerus articulates with both proximal ulna and radius, which are enclosed by one capsule and share single synovial cavity

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17
Q

Laterally, the capitulum of humerus articulates w/ head of radius to form what jt ?

A

humeroradial jt

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18
Q

Medially, the trochlea of humerus articulates w/ trochlear notch of ulna to form what jt ?

A

humeroulnar jt

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19
Q

what joint has a jt capsule that is continuous w/ that of humeroulnar and humeroradial jts, and is articulation of radial head w/ radial notch of ulna

A

PROXIMAL radioulnar jt

20
Q

What kind of jts are the humeroulnar and humeroradial jt ? What kind of muscle action does this yield?

A

hinge jts that flex and extend elbow in sagg plane

21
Q

During saggital motion of elbow, what happens?

A

trochlear notch of humerus slides into the trochlear groove of the ulna

22
Q

Upon elbow full flexion, what occurs ?

A

the coronoid process of ulna approximates the coronoid fossa of humerus

23
Q

At full ext, what what happens?

A

the olecranon process of ulna hit the olecranon fossa, thereby enhancing stability of elbow in full ext

24
Q

what kind of jt is proxoimal RU jt?

A

pivot jt

25
Q

proximal RU jt permits what>

A

axial rot of radial head during supination and pronation of forearm

26
Q

elbow ROM supination and pronation

A

80-90 degreee

27
Q

Anterior muscles of elbow muscle action

A

flex elbow

28
Q

what are the ant muscles of elbow?

A

biceps, brachilais, and brachioradialis

29
Q

long head of biceps origin

A

supraglenoid tubercle of scapula

30
Q

short head of biceps origin

A

coracoid process of scapula

31
Q

long and short heads of biceps insertion

A

tuberosity of radius

32
Q

biceps is a strong what and does what muscle action of elbow?

A

strong supinator and flexes elbow most effectively when forearm supinated

33
Q

long head biceps assists in what muscle action of shoulder?

A

shoulder flexion

34
Q

How do you effectively train biceps>

A

elbow flexion and forearm supination

35
Q

WHAT MUSCLE IS elbow flexor workhorse?

A

brachialis

36
Q

What pronates forearm?

A 
pronator quadratus (stronger)
pronator teres
37
Q

posterior muscles of elbow do what muscle action

A

extension of arm

38
Q

posterior muscles

A

ticeps and aconeus

39
Q

describe triceps

A

3 head, 2 jt muscles that acts on shoulder and elbow

40
Q

long head of triceps origin

A

infraglenoid tubercle of scapula

41
Q

medial and lat heads of triceps origin

A

upper humerus

42
Q

All 3 heads of triceps insertion

A

olecranon of ulna

43
Q

triceps is what muscle action

A

main elbow extensor

44
Q

aconeus provides

A

minor assistance to triceps in elbow flexion

45
Q

aconeus

A

a small muscle that adds stability to posterior elbow jt

ACSM CPT (15 decks)

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